498 lines
17 KiB
Plaintext
498 lines
17 KiB
Plaintext
// Copyright 2017 The Chromium Embedded Framework Authors. Portions copyright
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// 2013 The Chromium Authors. All rights reserved. Use of this source code is
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// governed by a BSD-style license that can be found in the LICENSE file.
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// Sample implementation for the NSAccessibility protocol for interacting with
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// VoiceOver and other accessibility clients.
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#include "tests/cefclient/browser/osr_accessibility_node.h"
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#import <AppKit/NSAccessibility.h>
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#import <Cocoa/Cocoa.h>
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#include "tests/cefclient/browser/osr_accessibility_helper.h"
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namespace {
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NSString* AxRoleToNSAxRole(const std::string& role_string) {
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if (role_string == "abbr")
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return NSAccessibilityGroupRole;
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if (role_string == "alertDialog")
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return NSAccessibilityGroupRole;
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if (role_string == "alert")
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return NSAccessibilityGroupRole;
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if (role_string == "annotation")
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return NSAccessibilityUnknownRole;
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if (role_string == "application")
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return NSAccessibilityGroupRole;
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if (role_string == "article")
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return NSAccessibilityGroupRole;
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if (role_string == "audio")
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return NSAccessibilityGroupRole;
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if (role_string == "banner")
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return NSAccessibilityGroupRole;
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if (role_string == "blockquote")
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return NSAccessibilityGroupRole;
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if (role_string == "busyIndicator")
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return NSAccessibilityBusyIndicatorRole;
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if (role_string == "button")
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return NSAccessibilityButtonRole;
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if (role_string == "buttonDropDown")
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return NSAccessibilityButtonRole;
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if (role_string == "canvas")
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return NSAccessibilityImageRole;
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if (role_string == "caption")
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return NSAccessibilityGroupRole;
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if (role_string == "checkBox")
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return NSAccessibilityCheckBoxRole;
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if (role_string == "colorWell")
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return NSAccessibilityColorWellRole;
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if (role_string == "column")
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return NSAccessibilityColumnRole;
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if (role_string == "comboBox")
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return NSAccessibilityComboBoxRole;
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if (role_string == "complementary")
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return NSAccessibilityGroupRole;
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if (role_string == "contentInfo")
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return NSAccessibilityGroupRole;
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if (role_string == "definition")
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return NSAccessibilityGroupRole;
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if (role_string == "descriptionListDetail")
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return NSAccessibilityGroupRole;
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if (role_string == "descriptionList")
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return NSAccessibilityListRole;
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if (role_string == "descriptionListTerm")
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return NSAccessibilityGroupRole;
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if (role_string == "details")
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return NSAccessibilityGroupRole;
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if (role_string == "dialog")
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return NSAccessibilityGroupRole;
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if (role_string == "directory")
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return NSAccessibilityListRole;
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if (role_string == "disclosureTriangle")
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return NSAccessibilityDisclosureTriangleRole;
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if (role_string == "div")
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return NSAccessibilityGroupRole;
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if (role_string == "document")
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return NSAccessibilityGroupRole;
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if (role_string == "embeddedObject")
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return NSAccessibilityGroupRole;
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if (role_string == "figcaption")
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return NSAccessibilityGroupRole;
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if (role_string == "figure")
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return NSAccessibilityGroupRole;
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if (role_string == "footer")
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return NSAccessibilityGroupRole;
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if (role_string == "form")
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return NSAccessibilityGroupRole;
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if (role_string == "genericContainer")
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return NSAccessibilityGroupRole;
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if (role_string == "grid")
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return NSAccessibilityGroupRole;
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if (role_string == "group")
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return NSAccessibilityGroupRole;
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if (role_string == "iframe")
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return NSAccessibilityGroupRole;
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if (role_string == "iframePresentational")
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return NSAccessibilityGroupRole;
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if (role_string == "ignored")
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return NSAccessibilityUnknownRole;
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if (role_string == "imageMapLink")
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return NSAccessibilityLinkRole;
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if (role_string == "imageMap")
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return NSAccessibilityGroupRole;
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if (role_string == "image")
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return NSAccessibilityImageRole;
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if (role_string == "labelText")
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return NSAccessibilityGroupRole;
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if (role_string == "legend")
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return NSAccessibilityGroupRole;
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if (role_string == "link")
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return NSAccessibilityLinkRole;
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if (role_string == "listBoxOption")
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return NSAccessibilityStaticTextRole;
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if (role_string == "listBox")
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return NSAccessibilityListRole;
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if (role_string == "listItem")
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return NSAccessibilityGroupRole;
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if (role_string == "list")
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return NSAccessibilityListRole;
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if (role_string == "log")
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return NSAccessibilityGroupRole;
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if (role_string == "main")
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return NSAccessibilityGroupRole;
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if (role_string == "mark")
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return NSAccessibilityGroupRole;
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if (role_string == "marquee")
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return NSAccessibilityGroupRole;
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if (role_string == "math")
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return NSAccessibilityGroupRole;
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if (role_string == "menu")
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return NSAccessibilityMenuRole;
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if (role_string == "menuBar")
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return NSAccessibilityMenuBarRole;
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if (role_string == "menuButton")
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return NSAccessibilityButtonRole;
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if (role_string == "menuItem")
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return NSAccessibilityMenuItemRole;
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if (role_string == "menuItemCheckBox")
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return NSAccessibilityMenuItemRole;
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if (role_string == "menuItemRadio")
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return NSAccessibilityMenuItemRole;
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if (role_string == "menuListOption")
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return NSAccessibilityMenuItemRole;
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if (role_string == "menuListPopup")
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return NSAccessibilityUnknownRole;
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if (role_string == "meter")
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return NSAccessibilityProgressIndicatorRole;
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if (role_string == "navigation")
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return NSAccessibilityGroupRole;
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if (role_string == "note")
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return NSAccessibilityGroupRole;
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if (role_string == "outline")
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return NSAccessibilityOutlineRole;
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if (role_string == "paragraph")
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return NSAccessibilityGroupRole;
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if (role_string == "popUpButton")
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return NSAccessibilityPopUpButtonRole;
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if (role_string == "pre")
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return NSAccessibilityGroupRole;
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if (role_string == "presentational")
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return NSAccessibilityGroupRole;
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if (role_string == "progressIndicator")
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return NSAccessibilityProgressIndicatorRole;
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if (role_string == "radioButton")
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return NSAccessibilityRadioButtonRole;
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if (role_string == "radioGroup")
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return NSAccessibilityRadioGroupRole;
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if (role_string == "region")
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return NSAccessibilityGroupRole;
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if (role_string == "row")
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return NSAccessibilityRowRole;
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if (role_string == "ruler")
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return NSAccessibilityRulerRole;
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if (role_string == "scrollBar")
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return NSAccessibilityScrollBarRole;
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if (role_string == "search")
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return NSAccessibilityGroupRole;
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if (role_string == "searchBox")
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return NSAccessibilityTextFieldRole;
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if (role_string == "slider")
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return NSAccessibilitySliderRole;
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if (role_string == "sliderThumb")
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return NSAccessibilityValueIndicatorRole;
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if (role_string == "spinButton")
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return NSAccessibilityIncrementorRole;
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if (role_string == "splitter")
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return NSAccessibilitySplitterRole;
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if (role_string == "staticText")
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return NSAccessibilityStaticTextRole;
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if (role_string == "status")
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return NSAccessibilityGroupRole;
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if (role_string == "svgRoot")
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return NSAccessibilityGroupRole;
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if (role_string == "switch")
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return NSAccessibilityCheckBoxRole;
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if (role_string == "tabGroup")
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return NSAccessibilityTabGroupRole;
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if (role_string == "tabList")
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return NSAccessibilityTabGroupRole;
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if (role_string == "tabPanel")
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return NSAccessibilityGroupRole;
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if (role_string == "tab")
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return NSAccessibilityRadioButtonRole;
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if (role_string == "tableHeaderContainer")
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return NSAccessibilityGroupRole;
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if (role_string == "table")
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return NSAccessibilityTableRole;
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if (role_string == "textField")
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return NSAccessibilityTextFieldRole;
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if (role_string == "time")
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return NSAccessibilityGroupRole;
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if (role_string == "timer")
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return NSAccessibilityGroupRole;
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if (role_string == "toggleButton")
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return NSAccessibilityCheckBoxRole;
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if (role_string == "toolbar")
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return NSAccessibilityToolbarRole;
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if (role_string == "treeGrid")
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return NSAccessibilityTableRole;
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if (role_string == "treeItem")
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return NSAccessibilityRowRole;
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if (role_string == "tree")
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return NSAccessibilityOutlineRole;
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if (role_string == "unknown")
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return NSAccessibilityUnknownRole;
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if (role_string == "tooltip")
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return NSAccessibilityGroupRole;
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if (role_string == "video")
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return NSAccessibilityGroupRole;
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if (role_string == "window")
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return NSAccessibilityWindowRole;
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return [NSString stringWithUTF8String:role_string.c_str()];
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}
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inline int MiddleX(const CefRect& rect) {
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return rect.x + rect.width / 2;
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}
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inline int MiddleY(const CefRect& rect) {
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return rect.y + rect.height / 2;
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}
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} // namespace
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// OsrAXNodeObject is sample implementation for the NSAccessibility protocol
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// for interacting with VoiceOver and other accessibility clients.
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@interface OsrAXNodeObject : NSObject {
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// OsrAXNode* proxy object
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client::OsrAXNode* node_;
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CefNativeAccessible* parent_;
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}
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- (id)init:(client::OsrAXNode*)node;
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+ (OsrAXNodeObject*)elementWithNode:(client::OsrAXNode*)node;
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@end
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@implementation OsrAXNodeObject
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- (id)init:(client::OsrAXNode*)node {
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node_ = node;
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parent_ = node_->GetParentAccessibleObject();
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if (!parent_) {
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parent_ = node_->GetWindowHandle();
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}
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return self;
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}
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+ (OsrAXNodeObject*)elementWithNode:(client::OsrAXNode*)node {
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// We manage the release ourself
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return [[OsrAXNodeObject alloc] init:node];
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}
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- (BOOL)isEqual:(id)object {
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if ([object isKindOfClass:[OsrAXNodeObject self]]) {
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OsrAXNodeObject* other = object;
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return (node_ == other->node_);
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} else {
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return NO;
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}
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}
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// Utility methods to map AX information received from renderer
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// to platform properties
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- (NSString*)axRole {
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// Get the Role from CefAccessibilityHelper and Map to NSRole
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return AxRoleToNSAxRole(node_->AxRole());
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}
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- (NSString*)axDescription {
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std::string desc = node_->AxDescription();
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return [NSString stringWithUTF8String:desc.c_str()];
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}
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- (NSString*)axName {
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std::string desc = node_->AxName();
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return [NSString stringWithUTF8String:desc.c_str()];
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}
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- (NSString*)axValue {
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std::string desc = node_->AxValue();
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return [NSString stringWithUTF8String:desc.c_str()];
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}
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- (void)doMouseClick:(cef_mouse_button_type_t)type {
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CefRefPtr<CefBrowser> browser = node_->GetBrowser();
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if (browser) {
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CefMouseEvent mouse_event;
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const CefRect& rect = node_->AxLocation();
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mouse_event.x = MiddleX(rect);
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mouse_event.y = MiddleY(rect);
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mouse_event.modifiers = 0;
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browser->GetHost()->SendMouseClickEvent(mouse_event, type, false, 1);
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browser->GetHost()->SendMouseClickEvent(mouse_event, type, true, 1);
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}
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}
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- (NSMutableArray*)getKids {
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int numChilds = node_->GetChildCount();
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if (numChilds > 0) {
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NSMutableArray* kids = [NSMutableArray arrayWithCapacity:numChilds];
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for (int index = 0; index < numChilds; index++) {
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client::OsrAXNode* child = node_->ChildAtIndex(index);
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[kids addObject:child ? child->GetNativeAccessibleObject(node_) : nil];
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}
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return kids;
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}
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return nil;
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}
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- (NSPoint)position {
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CefRect cef_rect = node_->AxLocation();
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NSPoint origin = NSMakePoint(cef_rect.x, cef_rect.y);
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NSSize size = NSMakeSize(cef_rect.width, cef_rect.height);
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NSView* view = node_->GetWindowHandle();
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origin.y = NSHeight([view bounds]) - origin.y;
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NSPoint originInWindow = [view convertPoint:origin toView:nil];
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NSRect point_rect = NSMakeRect(originInWindow.x, originInWindow.y, 0, 0);
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NSPoint originInScreen =
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[[view window] convertRectToScreen:point_rect].origin;
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originInScreen.y = originInScreen.y - size.height;
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return originInScreen;
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}
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- (NSSize)size {
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CefRect cef_rect = node_->AxLocation();
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NSRect rect =
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NSMakeRect(cef_rect.x, cef_rect.y, cef_rect.width, cef_rect.height);
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NSView* view = node_->GetWindowHandle();
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rect = [[view window] convertRectToScreen:rect];
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return rect.size;
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}
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//
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// accessibility protocol
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//
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// attributes
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- (BOOL)accessibilityIsIgnored {
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return NO;
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}
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- (NSArray*)accessibilityAttributeNames {
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static NSArray* attributes = nil;
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if (attributes == nil) {
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attributes = [[NSArray alloc]
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initWithObjects:NSAccessibilityRoleAttribute,
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NSAccessibilityRoleDescriptionAttribute,
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NSAccessibilityChildrenAttribute,
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NSAccessibilityValueAttribute,
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NSAccessibilityTitleAttribute,
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NSAccessibilityDescriptionAttribute,
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NSAccessibilityFocusedAttribute,
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NSAccessibilityParentAttribute,
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NSAccessibilityWindowAttribute,
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NSAccessibilityTopLevelUIElementAttribute,
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NSAccessibilityPositionAttribute,
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NSAccessibilitySizeAttribute, nil];
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}
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return attributes;
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}
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- (id)accessibilityAttributeValue:(NSString*)attribute {
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if (!node_)
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return nil;
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if ([attribute isEqualToString:NSAccessibilityRoleAttribute]) {
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return [self axRole];
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} else if ([attribute
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isEqualToString:NSAccessibilityRoleDescriptionAttribute]) {
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return NSAccessibilityRoleDescription([self axRole], nil);
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} else if ([attribute isEqualToString:NSAccessibilityFocusedAttribute]) {
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// Just check if the app thinks we're focused.
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id focusedElement = [NSApp
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accessibilityAttributeValue:NSAccessibilityFocusedUIElementAttribute];
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return [NSNumber numberWithBool:[focusedElement isEqual:self]];
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} else if ([attribute isEqualToString:NSAccessibilityParentAttribute]) {
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return NSAccessibilityUnignoredAncestor(parent_);
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} else if ([attribute isEqualToString:NSAccessibilityChildrenAttribute]) {
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return NSAccessibilityUnignoredChildren([self getKids]);
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} else if ([attribute isEqualToString:NSAccessibilityWindowAttribute]) {
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// We're in the same window as our parent.
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return [parent_ accessibilityAttributeValue:NSAccessibilityWindowAttribute];
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} else if ([attribute
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isEqualToString:NSAccessibilityTopLevelUIElementAttribute]) {
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// We're in the same top level element as our parent.
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return [parent_
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accessibilityAttributeValue:NSAccessibilityTopLevelUIElementAttribute];
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} else if ([attribute isEqualToString:NSAccessibilityPositionAttribute]) {
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return [NSValue valueWithPoint:[self position]];
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} else if ([attribute isEqualToString:NSAccessibilitySizeAttribute]) {
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return [NSValue valueWithSize:[self size]];
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} else if ([attribute isEqualToString:NSAccessibilityDescriptionAttribute]) {
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return [self axDescription];
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} else if ([attribute isEqualToString:NSAccessibilityValueAttribute]) {
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return [self axValue];
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} else if ([attribute isEqualToString:NSAccessibilityTitleAttribute]) {
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return [self axName];
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}
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return nil;
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}
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- (id)accessibilityHitTest:(NSPoint)point {
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return NSAccessibilityUnignoredAncestor(self);
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}
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- (NSArray*)accessibilityActionNames {
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return [NSArray arrayWithObject:NSAccessibilityPressAction];
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}
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- (NSString*)accessibilityActionDescription:(NSString*)action {
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return NSAccessibilityActionDescription(action);
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}
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- (void)accessibilityPerformAction:(NSString*)action {
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if ([action isEqualToString:NSAccessibilityPressAction]) {
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// Do Click on Default action
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[self doMouseClick:MBT_LEFT];
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} else if ([action isEqualToString:NSAccessibilityShowMenuAction]) {
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// Right click for Context Menu
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[self doMouseClick:MBT_RIGHT];
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}
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}
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- (id)accessibilityFocusedUIElement {
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return NSAccessibilityUnignoredAncestor(self);
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}
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- (BOOL)accessibilityNotifiesWhenDestroyed {
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// Indicate that BrowserAccessibilityCocoa will post a notification when it's
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// destroyed (see -detach). This allows VoiceOver to do some internal things
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// more efficiently.
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return YES;
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}
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@end
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namespace client {
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void OsrAXNode::NotifyAccessibilityEvent(std::string event_type) const {
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if (event_type == "focus") {
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NSAccessibilityPostNotification(
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GetWindowHandle(), NSAccessibilityFocusedUIElementChangedNotification);
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} else if (event_type == "textChanged") {
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NSAccessibilityPostNotification(GetWindowHandle(),
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NSAccessibilityTitleChangedNotification);
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} else if (event_type == "valueChanged") {
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NSAccessibilityPostNotification(GetWindowHandle(),
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NSAccessibilityValueChangedNotification);
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} else if (event_type == "textSelectionChanged") {
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NSAccessibilityPostNotification(GetWindowHandle(),
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NSAccessibilityValueChangedNotification);
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}
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}
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void OsrAXNode::Destroy() {
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if (platform_accessibility_) {
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NSAccessibilityPostNotification(
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platform_accessibility_, NSAccessibilityUIElementDestroyedNotification);
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}
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delete this;
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}
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// Create and return NSAccessibility Implementation Object for Mac
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CefNativeAccessible* OsrAXNode::GetNativeAccessibleObject(
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client::OsrAXNode* parent) {
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if (!platform_accessibility_) {
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platform_accessibility_ = [OsrAXNodeObject elementWithNode:this];
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SetParent(parent);
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}
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return platform_accessibility_;
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}
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} // namespace client
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